Allow software to run or install even if the signature is invalid: registry value RunInvalidSignaturesComputerHKLM\Software\Policies\Microsoft\Internet Explorer\Download
- Policy ID
- Advanced_InvalidSignatureBlock
- Scope
- Computer Configuration, User Configuration
- Supported on
- At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Internet Explorer › Internet Control Panel › Advanced Page
Registry
RunInvalidSignatures
REG_DWORDComputerUser…\Software\Policies\Microsoft\Internet Explorer\DownloadHKLM\Software\Policies\Microsoft\Internet Explorer\Download Current key
HKCU\Software\Policies\Microsoft\Internet Explorer\Download
HKCU\Software\Policies\Microsoft\Internet Explorer\Download
- Enabled value
- 1
- Disabled value
- 0
Apply with .reg · CMD · PowerShell
ComputerMachine-wide setting
.reg
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet Explorer\Download] ; Options (use only one) ; Enabled "RunInvalidSignatures"=dword:00000001 ; Disabled "RunInvalidSignatures"=dword:00000000
CMD
:: Options (use only one) :: Enabled reg add "HKLM\Software\Policies\Microsoft\Internet Explorer\Download" /v "RunInvalidSignatures" /t REG_DWORD /d 1 /f :: Disabled reg add "HKLM\Software\Policies\Microsoft\Internet Explorer\Download" /v "RunInvalidSignatures" /t REG_DWORD /d 0 /f
PowerShell
# Common: create the key New-Item -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Download' -Force | Out-Null # Options (use only one) # Enabled New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Download' -Name 'RunInvalidSignatures' -PropertyType DWord -Value 1 -Force | Out-Null # Disabled New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Download' -Name 'RunInvalidSignatures' -PropertyType DWord -Value 0 -Force | Out-Null
UserPer-account setting
.reg
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Download] ; Options (use only one) ; Enabled "RunInvalidSignatures"=dword:00000001 ; Disabled "RunInvalidSignatures"=dword:00000000
CMD
:: Options (use only one) :: Enabled reg add "HKCU\Software\Policies\Microsoft\Internet Explorer\Download" /v "RunInvalidSignatures" /t REG_DWORD /d 1 /f :: Disabled reg add "HKCU\Software\Policies\Microsoft\Internet Explorer\Download" /v "RunInvalidSignatures" /t REG_DWORD /d 0 /f
PowerShell
# Common: create the key New-Item -Path 'HKCU:\Software\Policies\Microsoft\Internet Explorer\Download' -Force | Out-Null # Options (use only one) # Enabled New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Internet Explorer\Download' -Name 'RunInvalidSignatures' -PropertyType DWord -Value 1 -Force | Out-Null # Disabled New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Internet Explorer\Download' -Name 'RunInvalidSignatures' -PropertyType DWord -Value 0 -Force | Out-Null